Paper-machine.



C. E. POPE.

PAPER MACHINE. APPLICATION FILED JUNE 16, 1915.

Patented May 2, 1916.

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. 11v VENTOR, If/zeal; Pop BY% WITNESS ATTORNEY.

" ora ion CHARLES E. Porn, or HOLYOKE, .mnssnonusnrrs.

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Specification of Letters Patent.

Patented May 2, 1916.

Application filed June 16, 1915, Serial No. 84,384.

prove a paper machine as to render it ca:

pable of the production ofa web or sheet having longitudinally thereof and between its opposite edges comparatively narrow zones in which are comprised a considerably decreased thickness of the sheet or web. Paper so-produced, slit longitudmally along lines at the middle of the zones of decreased thickness and then properly cross out into sections of proper s1ze are available and desirable in the production of the sheets or pages of loose leaf ledgers or other books, which sheets bound at the thin edges thereof in the binder back of a book, materially improve such book in respect of the flat disposition of the sheets or pages when the book is opened for use.

In' carrying out the invention, I provide, in conjunction with a wire gauzepulp carrier of a paper machine, means cooperating therewith for supplying liquid pulp in a thin wide stream layer onto the carrier,

7 means for causing a decrease in the depth of the 'flowing pulp layer in a lengthwise extending zone intermediately of the opposite edges of the said layer and at the location where said layer passes directly onto the gauze pulp carrier.

The invention as the same has been carried out is illustrated in the accompanying drawings and is set forth in the claims.

In the drawings: Figure 1 is a plan view of a portion of a Fourdrinier paper machine comprising the flow box, the endless gauze pulp carrier or wire and the appliance constituting the novel. instrumentahty for the acquirement of the object of the invention; Fig. 2 is a longitudinal sectional view as taken on line 22, Fig. 1. Fig. is a perspective view showing the new apphance,

Improve vThe object of this inventionis to so im-l and Fig. 4 is a plan view of the same, but

indicating a feature or capability to be hereinafter referred to. 'Fig. 5 is a longitudinal sectional View on line 5-5, Fig. 4;. Fig. fiisa cross sectional view showing the form of the sheet of paper produced before thereof. r I

the drawings, A represents the endless gauze pulp carrier or wire formed, mount- "ed and to runasusual in Fourdrinier paper- 'machmes; B represents the flow box to the rear of the wire and in proximity to the portion of the latter which has its course around the rear supporting roll therefor, and WhlCh, as usual, is cooperative with the wire for the supplying of the thin broad stream of l1qu1d pulp onto the latter.

C C represent the deckles and D D represent the slice bars, the forward one of the pair being adjusted so that its lower edge is somewhat closer to the plane in which the wire runs than the rear one, and all of the aforementioned or designated parts of the machine bein as usual. The flow box is shown as havlng at the forward mouth or delivery portion thereof a forward shelflike extension B the top of which is at approximately the same level as the top of the w1re.

Gr represents an apron, which may be of any suitable material, preferably a flexible material such as rubber-covered cloth, which is secured upon the upper side of the said shelf-like extension-B of the flow box and projecting forwardly over and upon the wire as shown. This apron is provided with thin, parallel tongues or members a a which project in parallelism forwardly from the apron proper and'longitudinally of the machine. The forward edge ;of the apron proper terminates slightly to the rear of the slice bars which latter, however, have their locations transversely over across the intermediate portions of the said tongues or extensions a. The opposite side portions of the apron b b are upturned and arranged closely alongside ofothe deckles.

The pulp in flowing forwardly in a thin, broad stream from the flow box is carried I the longitudinally slitting and subdividing by the apron onto the wire, and the pulp in its progression under the operation of the machine becomes a moist paper web as usual, as to the greater portions of the width thereof. The portion of the pulpadvancingbeyond the forward edge (Z of the apron proper and continuing upon the tongues or extensions a a, becomes lessened in thickness by reason of more or less thereof flowing off sidewise onto the wire and so that a lessened quantity of the pulp is carried to the forward ends of the extensions and therefrom passed or delivered onto the wire; thus the web becoming partially formed slightly forward of the slice bars is there, and throughout its running course forwardly, one having channeled portions or longitudinal zones of decreased thickness therein, as represented by a: in Fig. 6.

In Fig. 3 the apron G is shown as having forwardly extending tongues a w as integrally formed therewith, but in Figs. 4: and 5, the said tongues are indicated as separately made, having their rear portions lapped under the apron and secured thereto, preferably by temporary fastenings f f of any suitable character, such as tacks; such connection being a detachable one so that the tongues or extensions may be removed and the machine run without the use thereof for the manufacture of paper of uniform thickness throughout its entire width.

m we represent a pair of blades supported in vertical planes parallel with each other and longitudinally of the length of the machine, which have slightly overlapping relations closely alongside of the edges of the extensions (1 of the apron and projecting for a suitabl distance forwardly beyond such extensions. These blades have apertured hubs at their upper ends by means of which they are engaged and confined by set screws on a transverse horizontal rod 0 suitably supported by the opposite side members of the machine frame. These blades prevent the flowing into the channels or zones where the pulp is of lessened thickness at outer sides thereof, of the pulp which is delivered onto the wire to the rear and at the sides of the extensions, and contribute in the formation of the thin areas of the web of clearly defined longitudinally extending edges,-it being understood that after the progression of the pulp on the wire, a comparatively short distance during which the water ismore or less withdrawn, the sheet or web has become so formed and set as to thenceforth continue in its advancing movement with the maintenance of the relatively thick and thin portions, without the requirement beyond substantially the point indicated of the blade guards or plates.

I claim 1. The combination with the endless wire of a paper machine and the flow box for supplying a broad thinstream of liquid pulp onto the wire, of one or more thin fiat strips located at the place of the flow of the pulp onto the wire, and-extending forwardly onto the wire, and over which the pulp flows and by which the depth of the stream passing thereover and arriving onto the wire is decreased relatively to the depth flowed onto the major portion of the width of the wire.

'2. The combination with the endless wire of a paper machine andflthe flow box for supplying a broad thin stream of liquid pulp onto the wire, of one or more thin flat strips, located at the place of the flow of the pulp onto the wire, extending forwardly onto the wire and over which the pulp flows, and transverse slice bars extending horizontally over and across intermediate portions of the length of said strips.

3. In a paper machine, the combination with the endless wire and the flow box, of an apron extending from the pulp delivery portion of the flow box forwardly over and onto the wire and provided with forwardly projecting parallel extensions.

4:. In a paper machine, the combination with the endless wire, the flow box and the opposite deckles, of an apron extending from the pulp delivery portion of the flow box forwardly over and onto the wire, provided with forwardly projecting parallel extensions, and said apron having its opposite side portions upwardly extended and positioned closely alongside the deckles.

5. In a paper machine, the combination with the endless wire and the flow box, of an apron extending from the pulp delivery portion of the flow box forwardly over and upon the wire and provided with forwardly projecting thin parallel extensions detachably connected with the apron.

(i. In a paper machine, the combination with the endless wire and the flow box having at the pulp delivery mouth thereof a forward shelf-like extension projecting into proximity to the rear of the wire, of an apron secured upon the upper side of such shelf-like extension, projecting forwardly over and upon the wire and provided with thin parallel forward extensions.

7. In a paper machine, the combination with the endless wire, the flow box having at the pulp delivery portion thereof a forward shelf-like member projecting into proximity to the rear portion of the wire, the opposite deckles and the transverse slice bars, of an apron secured upon the upper side of said shelf-like extension projecting forwardly over and upon the wire, and provided with thin parallel forward extensions, across intermediate portions of Which the slice bars have their relations.

8. In a paper machine, the combination with the endless Wire and the flow box, of an apron extending from the pulp delivery portion of the flow box forwardly over and onto the wire, provided with forwardly projecting parallel extensions, and pairs of CHARLES E. POPE. Witness:

7 Gn R, DRISCOLL. 

